US7867420B2 - Process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process - Google Patents
Process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process Download PDFInfo
- Publication number
- US7867420B2 US7867420B2 US12/127,789 US12778908A US7867420B2 US 7867420 B2 US7867420 B2 US 7867420B2 US 12778908 A US12778908 A US 12778908A US 7867420 B2 US7867420 B2 US 7867420B2
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- US
- United States
- Prior art keywords
- connection element
- container
- wall
- cutting
- cutting element
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 25
- 239000012815 thermoplastic material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000010101 extrusion blow moulding Methods 0.000 title claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 57
- 230000035515 penetration Effects 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 239000000289 melt material Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 17
- 210000002445 nipple Anatomy 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000000071 blow moulding Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 abstract description 14
- 229920003023 plastic Polymers 0.000 abstract description 14
- 239000002828 fuel tank Substances 0.000 description 15
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 241000191291 Abies alba Species 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/022—Particular heating or welding methods not otherwise provided for
- B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
- B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
- B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
- B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
- B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/63—Internally supporting the article during joining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03177—Fuel tanks made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2008—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2021—Inserts characterised by the material or type
- B29C2049/2047—Tubular inserts, e.g. tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/007—Using fluid under pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0009—Cutting out
- B29C2793/0018—Cutting out for making a hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06905—Using combined techniques for making the preform
- B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
- B29C49/06914—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets using parallel sheets as a preform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/03453—Arrangements or special measures related to fuel tanks or fuel handling for fixing or mounting parts of the fuel tank together
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49833—Punching, piercing or reaming part by surface of second part
Definitions
- the invention concerns a process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process.
- the invention concerns, in particular, a process for the production of a fuel tank of thermoplastic material and a connection element for such a fuel tank.
- Fuel tanks of thermoplastic material are basically to be impermeable to hydrocarbons. They are usually produced from multi-layer co-extrudates containing barrier layers for hydrocarbons.
- the plastic materials used for the production of plastic fuel tanks for example polyethylene, are basically not diffusion-tight in relation to hydrocarbons. In addition those plastic materials have a tendency to swell up in the presence of fuel. For that reason, the known fuel tanks of plastic material are provided with a multi-layer wall in which an EVOH layer is embedded as a hydrocarbons barrier. In that respect, the lack of diffusion-tight integrity of the base material used does not represent any problem.
- fuel tanks are provided with installation fitments and they have air intake and venting lines as well as electrical connections.
- the finished container To produce means for passing them through the tank wall, it is known for the finished container to be provided with cut-out openings into which connection means, valves or the like are fitted.
- the valves, valve covers and nipples are welded to the outside wall of the container in such a way as to cover the respective opening.
- Such connecting locations on a fuel tank represent potential leakage points.
- leakage does not mean the loss of liquid in the true sense, but rather that means diffusion leakage or diffusion losses in the region of seam locations and/or welds without involving additional barrier measures.
- connection means and valves In order to avoid leakage paths at connections on the fuel tank, it is known for connection means and valves to be produced in the form of complicated and expensive two-component structural parts, in which case those structural parts usually have at least one part comprising a plastic material which is weldable to the tank wall. Functional parts on such elements in contrast usually consist of plastic materials which do not swell up in the presence of fuel. Those plastic materials generally cannot be welded to the plastic materials used for the tank wall.
- EP 1 211 196 A1 describes a double-shell fuel tank of thermoplastic material with a barrier layer for hydrocarbons, which is embedded in the container wall, the shell portions which are assembled to constitute the container having been produced by thermoforming.
- EP 1 211 196 A1 proposes a two-part connection element or two-part fitting which includes at least an outer component and an inner component, wherein the outer component is welded to the outer wall of the container and the inner component at least partially passes through the outer component with displacement and intermediate positioning of the container wall. That arrangement has the advantage that the container wall is so displaced and enclosed between the component parts that the displaced material serves as a sealing means for the passage through the container wall.
- Such a passage through the container wall can be comparatively easily produced in the operation of thermoforming the half-shell portions of the container, but such a connection is more difficult to implement when producing a fuel tank by extrusion blow molding.
- the object of the invention is to provide a process for the production of a container, in particular a fuel tank of thermoplastic material, with which it is possible for connection elements to be provided on the container during the production thereof using the simplest possible means.
- the invention seeks to provide that as far as possible leakage paths for hydrocarbons in the wall of the container are avoided or are restricted to a minimum.
- a process for the production of a container of thermoplastic material by extrusion blow molding in which during shaping of the container within a multi-part tool, the container is provided with at least one connection element which passes through the wall of the container, wherein the wall of the container is pierced in the still plasticized condition with a part of the connection element in such a way that the connection element entails a connection involving a flow of material with the container wall at least in partial regions, wherein the connection element is provided with a penetration tip and the connection element upon penetration of the container wall is pushed into a die which is provided in the tool and which is or becomes arranged on the side of the container wall that is remote from the connection element.
- the penetration tip and the die can be of such a configuration in that case that the wall of the container is opened in the region in question, in which penetration occurs, in such a way that substantially no or only a very slight degree of protuberance of the container wall is produced. If the diameter of the die is only immaterially larger than that of the penetration tip of the connection element, then the opening which is pierced by the connection element in the wall of the container is substantially stamped out. If, at its end which is to be passed through the wall of the container, the connection element is of a given configuration for receiving connection components such as tubes or hoses, that ensures that the penetration end of the connection element projects freely out of the wall of the container. It is self-evident to the man skilled in the art that some slight post-processing may possibly be required for that purpose upon or after removal of the container from the tool.
- connection element is used as a lost shaping punch which pierces the wall of the container from one side.
- the connection element itself is used in that case as a means for piercing the container wall and remains as a lost shaping punch in the container wall.
- the tool serves in that case as a die or receiving means or as a support for the part of the connection element, which is to be pushed through the wall of the fuel tank.
- the expression “piercing the container wall” in accordance with the invention is to be interpreted as meaning that the material in the peripheral region of the opening produced in that way in the wall of the container is to experience as little deformation as possible in the sense of forming a protuberance.
- the process desirably includes the extrusion of two preforms in web form, each web thereof forming a container shell portion.
- the webs are shaped in a three-part molding tool comprising outer molds and a central mold, wherein the central mold has movable or slidable component holders, by means of which components can be placed at the inside wall of the container in the operation of shaping out the container in the mold.
- the connection element is in that way caused to pass through the container wall from the inside outwardly.
- connection element when penetrating through the container wall, the connection element is pushed into a die which is provided in the tool and which is arranged on the side of the container wall, that is remote from the connection element.
- a die can be easily formed by an opening in the tool.
- connection element used is a nipple provided with a peripherally extending flange for welding to the container wall. Welding to the container wall takes place on the side of the peripherally extending flange, that is, towards the container wall. In addition, a weld is made with that part of the periphery of the connection element which passes through the container wall.
- connection element and a functional component which is to be provided, for example, at the inside of the container can be integrally connected together so that, for example, the connection element has a part for passing through the container wall with a flange-like collar formed thereon, while on the other hand it integrally has, for example, a valve housing, a beading-out container or any other plastic component part.
- connection element does not necessarily have to be in the form of a nipple, but rather it can also be in the form of a plug connector, a plug coupling means or the like.
- the penetration tip can be, for example, a cutting element of a sleeve shape, which is fitted removably by means of a latching or snap-action connection onto a complementary latching profile configuration of the connection element.
- the removable penetration tip fitted onto the connection element protects the connection element from becoming covered or clogged by the displaced plastic material. Particularly if the connection element passes through the container wall from the inside outwardly, the penetration tip can be easily removed after the container is finished.
- the cutting element is used a plurality of times.
- connection element for use in relation to a process according to the invention, which is distinguished in that it is in the form of a tubular penetration element with a peripherally extending collar for welding to the container wall, wherein a part of the connection element is provided with a peripherally extending cutting edge.
- connection element is of a two-part structure, wherein a part of the connection element is in the form of a removable cutting element.
- Such a cutting element can be, for example, of a sleeve-shaped configuration, in which case it desirably surrounds the insertion side of the connection element, which is provided for piercing the wall.
- connection element is, for example, in the form of a conventional nipple with ends which are provided for hoses or lines to be crimped thereon and which usually have what is referred to as a Christmas tree profile
- cutting element surrounds the profiled spigot in question of the connection element or the nipple in such a way that the connection profile thereof is not fused to or covered with thermoplastic material.
- the cutting element is latched to the connection element.
- connection element it is in the form of a nipple with at least one outer holding profile, the holding profile co-operating in positively locking relationship with the cutting element.
- the holding profile for that purpose can have, for example, a peripherally extending latching recess cooperating with one or more latching hooks or latching projections on the cutting element.
- the cutting element is desirably in the form of a substantially cylindrical sleeve having a peripherally extending cutting edge which leads in the position of installation.
- the cutting edge is desirably in the form of a wavy line so that at its leading end the cutting element is in the form of a cutter crown.
- the cutting element in the longitudinal direction has at least one inner subdivision means which provides for the formation of at least one melt material chamber which is at the front in the cutting direction and at least one melt material chamber which is at the rear in the cutting direction.
- the plasticized thermoplastic material which is displaced when the wall is pierced is firstly caught in the front melt material chamber.
- the material is possibly also displaced into the melt material chamber which is at the rear in the cutting direction.
- the melt material chambers communicate with each other by way of at least one melt material passage.
- FIG. 1 shows a diagrammatic view of a first variant of a connection element fitted onto a component holder prior to piercing of the container wall therewith;
- FIG. 2 shows the operation of piercing the container wall by means of the connection element according to the invention
- FIG. 3 diagrammatically shows the connection element remaining in the container wall as well as the procedure involved in removing the cutting element
- FIG. 4 shows a further variant of a connection element according to the invention.
- FIG. 1 diagrammatically shows only a part of a wall of a blow molding tool 1 .
- the complete blow molding tool as well as the associated extruders and removal apparatuses and the like are not shown for reasons of simplicity.
- the outer molds are displaceable away from and towards each to provide an opening and closing movement of the blow molding tool.
- the central mold is displaceable transversely with respect to the opening and closing movement of the outer molds.
- the central mold includes pneumatically displaceable or slidable component holders with which installation fitments can be placed in the container to be produced.
- the container according to the invention, is in the form of a fuel tank of thermoplastic material, which is extruded in a multi-layer configuration.
- the process includes the extrusion of preforms in web form from extrusion heads, wherein the preforms are respectively cut to length between the outer molds and the central mold.
- the outer molds are closed with respect to the central mold.
- the preforms are pressed or drawn into the cavity portions of the tool, which are formed by the outer molds, by means of pressure gas actuation and/or by means of an externally applied vacuum.
- the connection element 3 which is placed on the component holder 2 is displaced in a direction towards an outer mold (blow molding tool 1 ) so that the connection element 3 pierces the wall 4 of the preform 5 .
- the component holder 2 shown in FIG. 2 is drawn into the central mold (not shown).
- the outer molds are moved away from each other and the central mold is displaced transversely to the opening and closing movement between the outer molds so that the outer molds can close again and the preforms which in the meantime form respective half-shell portions can join together to form a closed container.
- connection element 3 can be in the form of a connection nipple which, on each side of a peripherally extending collar 6 , forms a respective spigot 8 provided with a Christmas tree profile 7 .
- the connection element 3 has an end 9 which leads in the insertion direction and an end 10 which is at the rear in the insertion direction.
- fitted onto the leading end 9 is a hollow cutting element 11 of a sleeve shape, which has a front peripherally extending cutting edge 12 .
- the cutting edge 12 is in the configuration of a wavy line and has a crown-shaped profile, thereby simplifying the operation of piercing the wall 4 of the preform 5 .
- the cutting edge 12 does not necessarily have to be of a configuration in the form of a wavy line, but rather it can also involve the contour of the cutting element shown in FIG. 4 .
- At the end of the cutting element 11 remote from the cutting edge 12 it is provided with inwardly protruding, resilient latching projections 13 which snap into a peripherally extending latching recess 14 at the periphery of the spigot 8 .
- the latching projections 13 can each be provided on latching springs of the cutting element, which can be formed for example by longitudinal slots of a suitable configuration therein.
- a peripherally extending abutment 15 for the cutting element 11 is provided on the spigot 8 of the connection element 3 at its leading end 9 .
- the cutting element forms a first melt material chamber 16 which leads in the insertion direction.
- a second melt material chamber 17 Disposed therebehind in the insertion direction is a second melt material chamber 17 .
- the melt material chambers 16 , 17 are communicated with each other through a melt material passage 18 .
- the connection element 3 which is fitted onto the component holder 2 is pushed by means of the component holder 2 into the wall 4 of the preform 5 , in which case the plastic material which in that situation is penetrated and displaced by the cutting element 11 is urged into the opening 19 .
- the material flows into the first melt material chamber 16 and possibly through the melt material passage 18 into the second melt material chamber 17 .
- FIG. 2 shows the component holder in the retracted condition and the connection element which has completely penetrated the wall 4 of the preform 5 , in which case the peripherally extending collar 6 of the connection element 3 bears over the full surface area involved against the wall 4 and is welded to the wall of the preform 5 , the wall still being in a plastic condition.
- the cutting element 11 can be removed from the outwardly projecting spigot 8 of the connection element 3 , as is shown in FIG. 3 .
- connection element 3 is of a symmetrical configuration in the form of a nipple or a double nipple, wherein provided on each side of the peripherally extending collar 6 is a respective spigot 8 having a Christmas tree profile 7 , and the two spigots are of approximately the same length and the profiling 8 of the spigots is identical so that the cutting element 11 can be fitted onto each side of the connection element 3 .
- the cutting element 11 is provided with an internal subdivision means 20 through which passes the melt material passage 18 .
- a melt material passage 18 it is also possible to provide a plurality thereof.
- connection element 3 In the variant of the connection element 3 shown in FIG. 4 , it is provided at its leading end 9 with a cutting element 11 which is not in the form of a removable sleeve, but in the form of an integral constituent part of the connection element 3 .
- the leading end 9 of the connection element is enlarged in a socket-like configuration and provided with a peripherally extending cutting edge 12 which is curved in the form of a circular arc in the sectional view shown in FIG. 4 . That particular geometry of the cutting edge permits the wall of the container to be penetrated or stamped through, with a comparatively low level of penetration resistance, in order to prevent excessive protruding of the wall 4 of the container. If necessary, the cutting element can be cut off after manufacture of the container in a post-working step.
- the variant of the connection element 3 shown in FIG. 4 has a profiling, on the surface 21 of the collar 6 , that is, towards the wall 4 .
- the sawtooth-like structure of the surface 21 provides for a region-wise reduction in the thermal capacity of the plastic material so as to ensure easy weldability to the wall 4 of the container.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
- 1 blow molding tool
- 2 component holder
- 3 connection element
- 4 wall
- 5 preform
- 6 collar
- 7 Christmas tree profile
- 8 spigot
- 9 leading end
- 10 rear end
- 11 cutting element
- 12 cutting edge
- 13 latching projections
- 14 latching recess
- 15 abutment
- 16 first melt material chamber
- 17 second melt material chamber
- 18 melt material passage
- 19 opening
- 20 subdivision means
- 21 surface
Claims (12)
Priority Applications (1)
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US12/127,789 US7867420B2 (en) | 2007-05-25 | 2008-05-27 | Process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process |
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US94023707P | 2007-05-25 | 2007-05-25 | |
US12/127,789 US7867420B2 (en) | 2007-05-25 | 2008-05-27 | Process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process |
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US20080290564A1 US20080290564A1 (en) | 2008-11-27 |
US7867420B2 true US7867420B2 (en) | 2011-01-11 |
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US12/127,789 Active US7867420B2 (en) | 2007-05-25 | 2008-05-27 | Process for the production of a container of thermoplastic material by extrusion blow molding and a connection element for use in such a process |
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US20110226777A1 (en) * | 2010-03-16 | 2011-09-22 | Fts Co., Ltd. | Fuel tank for motor vehicle |
CN103442921A (en) * | 2011-03-24 | 2013-12-11 | 考特克斯·特克斯罗恩有限公司及两合公司 | Fuel tank of thermoplastic polymer for a motor vehicle and method for the production of a fuel tank |
US20150217635A1 (en) * | 2013-02-07 | 2015-08-06 | Fts Co., Ltd. | Automobile fuel tank |
US9242549B2 (en) | 2013-03-11 | 2016-01-26 | Ti Automotive Technology Center Gmbh | Method of blow molding reservoir, and reservoir made thereby |
US20160075074A1 (en) * | 2013-04-17 | 2016-03-17 | Kautex Textron Gmbh & Co. Kg | Method for producing a container from thermoplastic material |
US20160236259A1 (en) * | 2015-02-12 | 2016-08-18 | Ford Motor Company | Method and Apparatus for Attaching a Nut in a Hydro-Forming Tool |
US11525534B2 (en) | 2018-08-14 | 2022-12-13 | Reliance Worldwide Corporation | Tubular connector |
US11802643B2 (en) | 2018-04-24 | 2023-10-31 | Reliance Worldwide Corporation | Fluid connector |
US12104730B2 (en) | 2020-03-13 | 2024-10-01 | Reliance Worldwide Corporation | Push-to-connect fitting providing an insertion indication |
US12228231B2 (en) | 2022-09-30 | 2025-02-18 | Reliance Worldwide Corporation | Plumbing connector |
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Cited By (17)
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US8287799B2 (en) * | 2006-09-04 | 2012-10-16 | Kautex Textron Gmbh & Co. Kg | Process for the production of a fuel tank and a fuel tank |
US20080078761A1 (en) * | 2006-09-04 | 2008-04-03 | Kautex Textron Gmbh & Co. Kg | Process for the production of a fuel tank and a fuel tank |
US9856077B2 (en) | 2006-09-04 | 2018-01-02 | Kautex Textron Gmbh & Co. Kg | Process for the production of a fuel tank and fuel tank |
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CN103442921B (en) * | 2011-03-24 | 2016-11-09 | 考特克斯·特克斯罗恩有限公司及两合公司 | Fuel tank of thermoplastic polymer for motor vehicle and method of producing fuel tank |
US20150217635A1 (en) * | 2013-02-07 | 2015-08-06 | Fts Co., Ltd. | Automobile fuel tank |
US9242549B2 (en) | 2013-03-11 | 2016-01-26 | Ti Automotive Technology Center Gmbh | Method of blow molding reservoir, and reservoir made thereby |
US10005221B2 (en) * | 2013-04-17 | 2018-06-26 | Kautex Textron Gmbh & Co. Kg | Method for producing a container from thermoplastic material |
US20160075074A1 (en) * | 2013-04-17 | 2016-03-17 | Kautex Textron Gmbh & Co. Kg | Method for producing a container from thermoplastic material |
US20160236259A1 (en) * | 2015-02-12 | 2016-08-18 | Ford Motor Company | Method and Apparatus for Attaching a Nut in a Hydro-Forming Tool |
US11802643B2 (en) | 2018-04-24 | 2023-10-31 | Reliance Worldwide Corporation | Fluid connector |
US11525534B2 (en) | 2018-08-14 | 2022-12-13 | Reliance Worldwide Corporation | Tubular connector |
US12049974B2 (en) | 2018-08-14 | 2024-07-30 | Reliance Worldwide Corporation | Tubular connector |
US12104730B2 (en) | 2020-03-13 | 2024-10-01 | Reliance Worldwide Corporation | Push-to-connect fitting providing an insertion indication |
US12228231B2 (en) | 2022-09-30 | 2025-02-18 | Reliance Worldwide Corporation | Plumbing connector |
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